While leaving the Chateau Marmont in Hollywood yesterday, the "Newsroom" actress gave photogs an eyeful when her wide-knit sweater malfunctioned under the flash bulbs. To put it a little more bluntly, you could see a lot more chest than Olivia bargained for.

Our first thought: Why wasn't she wearing a bra? Underwear peek-a-boo has become commonplace among celebs, so a little bra sighting would have been no big deal. So now you know for next time, Olivia...

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